Semimetallic features in thermoelectric transport properties of 2H-3R phase niobium diselenide
- Authors
- Moon Hongjae; Kim Jeongmin; Bang Joonho; Hong Seokkyoon; Youn Seonhye; Shin Hyunjun; Roh Jong Wook; Shim Wooyoung; Lee Wooyoung
- Issue Date
- Dec-2020
- Publisher
- Elsevier BV
- Citation
- Nano Energy, v.78
- Journal Title
- Nano Energy
- Volume
- 78
- URI
- https://yscholarhub.yonsei.ac.kr/handle/2021.sw.yonsei/6478
- ISSN
- 2211-2855
2211-3282
- Abstract
- In two-dimensional van der Waals crystals, the interlayer stacking sequence often leads to a change in crystal symmetry and, thus, new polymorphs, leading to an abundant array of physical properties. In this paper, we report the polymorphic form of 2H-3R-NbSe2 that exhibits a substantial difference in terms of the gate dependence of semimetallic behavior and Seebeck coefficient, compared to the well-known 2H-NbSe2 with metallic transport behavior. The semimetallic features of 2H-3R-NbSe2 indicate the presence of minor carriers, confirmed through theoretical calculations, which is in good agreement with the transport behavior. Our results reveal perspectives for understanding the metastable 2H-3R phase NbSe2, which is not far from equilibrium, and for engineering the materials necessary for efficient energy harvesting.
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Collections - College of Science > Physics > 1. Journal Articles
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